The 5 'facts' you've ever learned in school turned out to be completely wrong

Over time, even events that we consider to be immutable can change. There are things that you can expect from school, but they are not.

The 5 ideas you used to study in the school below are no longer accurate.

1. Pluto is a planet

The Pluto.

We know that since the late 1800s people have found clues about the existence of the ninth planet after Uranus. Even in 1906, Percival Lowell, founder of Lowell Observatory in Flagstaff, Arizona, began a research project to search for the mysterious 10th planet.

In 1930, a 23-year-old newcomer named Clyde Tombaugh found this ninth planet. Every week, he was tasked with comparing the image of the sky systematically to search for moving objects.

Eventually he discovered a planet and submitted this result to Harvard University Observatory. The new planet is named after a Greek god (Pluto) and from there we see Pluto as a planet in the solar system.

But in 2003, an astronomer discovered an object larger than Pluto that he named Eris. New information has led many other astronomers to ask: what makes an object a planet? And they decided based on its size and location - Pluto did not meet this condition, and Eris was the same. After that, Pluto was lowered into a dwarf planet.

2. The Great Wall is the only artificial structure that can be seen from space

The Great Wall is never seen from space.(Photo: Internet).

To be honest, this is not a science-tested fact, it is just a belief of many people that began in 1938.

However, in 2003, the first Chinese astronaut Yang Liwei broke this myth. He admitted he could not see the Great Wall from space.

The Great Wall can only be seen in some extremely rare cases: when there is heavy snow on it or we look from space to the Great Wall with a camera that is able to zoom.

Astronaut Alan Bean of Apollo 12 told NASA: "The only thing you can see from the Moon is a beautiful sphere, which is covered mainly by white, some light blue and light yellow. , and mixed in there are some green vegetation. No artificial objects can be seen at this distance. "

3. The Israeli slaves built the Pyramids

The Egyptians built their own Pyramids, not Jews.

Even in the movie 'The Prince of Egypt' , people still assume that the Israeli slaves built the Pyramids. Although many people think the Bible has mentioned it, the book doesn't really cover the story in detail.

According to Amihai Mazar, a professor at the Hebrew University in Jerusalem, this myth comes from the opinion of former Israeli Prime Minister Menachem Begin when visiting Egypt in 1977.

Professor GMazar told AP: "Jews never built pyramids because Jews did not exist during the time when the pyramid was built."

Recent archaeological evidence shows that the Egyptians built the Pyramids themselves.

4. It is impossible to fold a paper more than 7 times

Whether in art or science, this 'rumor' is certainly well known, but Britney Gallivan, a California high school student, doesn't believe this.

She and some volunteers bought a giant roll of toilet paper worth $ 85 and surprised everyone by folding it 11 times. She realized that everyone tried to fold in different directions so they could not fold many times. She even developed an equation based on the thickness and width of the paper to explain why people should not fold paper like that.

In 2012, a student at St. John's College Mark in Southborough, Massachusetts, broke Gallivan's record by folding one sheet of paper 13 times.

5. Diamond is the hardest thing

Wurtzide boron nitride is 18% harder than diamond.

According to Scientific American, we have known about two harder substances than diamond since 2009: wurtzite boron nitride and lonsdaleite . The first substance is 18% stronger than diamond and the second one is 58%.

But in nature, both substances are inconspicuous and unstable. In fact, the authors of the study only calculated the hardness of new substances instead of actually examining them as a hand-held specimen. That makes this discovery somewhat theoretical.

In 2013, another group of scientists conducted compacting of boron nitride particles , then rearranging their structure into various shapes such as onions, roses or Russian dolls. After that, there were many women around the world who wanted to attach boron to their engagement ring, because it would remain intact forever.